Pressure-controlled regulator.



J. 'I'. WEITBREC.

PRESSURE GONTROLLED REGULATOR.

'PPLITION FILED JUNE 27,1907. 9 1 0,03 3 Patented J an. 19, 1909.

2 SHEETS-SHEET 1. lla Z ls l L 7N: NoRRls Psrrns ca. wAsumnrcN. q. c.

J. T. WEITBREC. PRESSURE GONTROLLED REGULATOR.

APPLIOATION FIL-ED JUNE 27, 1907.

910,033, Patented J an. 19, 1909.

2 SHEETS-SHEET 2.

Ll I-I *LI /f ttozucuo v:nu: Nunms rsrsRs ca. wAsHmurcN. n. 6.

JOHN T. WEITBREC, OF DENVER, COLORADO.

PRESSURE-CONTROLLED REGULATOR.

Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed June 27, 1907. Serial No. 381,118.

To all whom it may concern:

Be it known that I, JOHN T. WEITBREG, a citizen of the United States,residing at Denver, in the county of Denver and State of Colorado, haveinvented certain new and useful Improvements in Pressure-ControlledRegulators; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in pressurecontrolled regulators for steam boiler furnaces and has for its objectthe production of a simple and efliciently operating device of this kindwhich may be readily applied in operative position to a steam boilerfurnace and which is adapted to operate to open the damper or damper-sand draft doors of the furnace to cause the re to burn more vigorouslyshould the pressure in the boiler fall below a ccrin other words, to

tain number of pounds;

boiler within cerkeep the pressure in the tain fixed limits.

In the accompanying drawings, Figure l is a front elevation of theinvention applied in operative position to a steam boiler furnace; Fig.la is a horizontal section taken on the plane indicated by the dottedlines a-a of Fig. 1; Fig. 2 is a vertical section of the regulatordetached from position, and, Fig. 3 is an enlarged detail sectional viewof one of the release valves employed in connection with the invention.

Referring more particularly to the drawings, which are for illustrativepurposes only and are, therefore, not drawn to scale, the numerals 1, 2and 3 doors, the stack and the damper, respectively, of an ordinarysteam boiler furnace.

In carrying out the invention, I provide an upright cylinder 4comprising a barrel 5 having secured to its upper end a head 6 providedwith a stuffing box 7 of any well known construction and with twooutwardly extending laterally projecting fastening lugs or plates 8 bymeans of which the upper end of the cylinder may be attached in positionto the front of the furnace.

A piston receiving member is screwed to the lower end of the barrel,said member comprising a bottom 10 formed with a centrally disposedflared valve opening 11 and indicate the ash pit an upright cylindricalbody 12 provided with two outwardly extending laterally projectingfastening lugs 13 by means of which the lower end of the cylinder may beattached in position to the furnace. A piston 14 is arranged in saidpiston receiving member and is provided with the usual rod or stem 15which extends through the stuiling box 7 and is screwed to a cross head16 connected with the inner end of a horizontally disposed operatinglever 17 pivotally connected at said end above the cylinder in anysuitable manner and having adjustably mounted on its free end a suitableweight 18.

The numeral 19 indicates a valve member comprising an outwardly flaredvalve 2O adapted to close the valve opening in the bottom of the pistonreceiving member and a threaded stem 21 which extends through said valveopening and is screwed to the piston 14.

A cylindrical wall 22 depends from the bottom of the valve receivingmember, the lower end of said wall being covered or closed in by ascrew-threaded ca 23, the space inclosed by said wall constituting astem chamber 24, the purpose of which will be disclosed.

A main upright cylinder 25 is attached to the front of the furnaceadjacent to the cylinder 4 and comprises an upright barrel 26, the upperend of which is covered by a suit able head 27 provided with a suitablestufling box 28 and with two laterally projecting' fastening studs orplates 29 by means of which the upper end of the cylinder may befastened in position. The lower end of the barrel 26 is covered by abottom or cap 30, also provided at diametrically opposite points withlaterally projecting studs or plat'es 31 by means of which the lower endof the main cylinder may be secured in position.

A piston 32 is arranged in said barrel 26 and is provided with the usualrod or stem 33 which extends through the stuiing box 28 and is screwedto a cross head 34 formed with a longitudinal slot 35 near its upperedge to receive one arm of a bell crank lever 36 pivoted to the front ofthe furnace adjacent to said main cylinder. The other or' free arm ofsaid lever is connected by means of the horizontally disposed connectingrod 37 to the free end of a turning arm 38 connected in turn with theupper end of a veri l l V and at its opposite end to the lower end "of 1Y the rock shaft 39" for opening said doo-rwhen the rock shaft is rockedin oneY direction and for closing the door when said shaft is rocked inthe opposite direction. An arm ist is also secured. to said rock shaft39 at a point, above said doors 1 and is connected' with the adjfacentend of' a horizontally disposed connecting rod 45', the opposite end of'which is in turn connectedl with the free end of' an arm 46' fixed tothe upper end of a second vertically disposed rock shaft 47 the ends ofwhich are also reduced as at 4&8 to fit in corv responding socketsformed in bearings. L,t9 suitably secured to the front ofthe furnace. Anoperating armv 50 is rigidly connected at its upper end with said rockshaft 4&7' and at its opposite end with the adjacent ash pit door toopen or close the latter as the case may be when said shaft is actuated.A chain 51y is arranged between the cross head 34E and one end of' thedamper operatingI arm carried by the outer end of a damper bar or rod 53which extends transversely through the stack and supports the damper 3.,

Communication is established between the steam chamber 2li and the upperend of the main cylinder 25 by the steam conducting pipe 55 and betweenthe piston receiving member 12 and the lower end of' the main cylinder'by a conducting pipe 56'. The pis-- ton 14 is normally maintained asuitable distance above the bottom of the piston receiving member 12leaving` a space 51 therebetween, and communicating with said space andwith the steam chamber of the boiler is a conducting pipe 5.8.

An outlet pipe 59 communicates with the body of the piston receivingmember 12 at a point above said piston 1l when the latter is in itslowermost position, and is provided at its free end with a verticallydisposed or des pending escape valve 60. A similar valve 6l is alsoarranged at a suitable point intermediate of the' length of the steampipe the purpose of which will be shown..

As clearly shown in Fig. 3 of the drawings,l said valves comprisecylinders 62 formed in their heads with suitable valve openings 63'adapted to be normally closed by corresponding valves 64 havingvertically disposed stems 65' adapted to extend in the vertical boresl66 of adjusting plugs 67 screwing in the bottom walls of said cylinders.

Collars 68 freely encircle the lower ends of said stems and bear on theinner ends of the adjustable plugs 67 and arranged between said collarsand shoulders 69 formed near the upper ends of the valve stems arecoiled cylinder springs 70:. cylinders 62 are pio-vided neark theirVlower ends with outlet ports 71 in which'are secured outlet pipes 7 2.

lllxteriorly threaded rims 7 3 are formed at the upper ends of thecylinders whereby they may be screwed in position.

'In practice, when the pressure of the steam in the boiler is notsufficient to raise the piston 1li,4 the steam passes through the pipe58, through the space 57 between said piston and the bottom of thepiston receiving memberand through the val-ve opening in the bottom ofthe piston receiving member into.` the steamchamber 24; from which it isconducted to the upper end of the main by the conducting pipe 5.5.`During,A the passage of the steam from the boiler to theY main eylinderthe valve 6e of release valve, 61 is held i its seat against 5 thepressure exerted thereon by the steam by its spring 70. :steam in the.boiler is, suliiciently great to j. raise the weighted piston 14, the,valve 2,() of l valve member 19 closes, the.v valve. opening L theybottom of' the piston receiving member L and changes the course ofthestream through E the pipe 56v under of the steam exerted upon the pistonraising the same, 5 by ltS actuates l @the medium of the connectionsheretofore described, operates to close the ash pit doors. and stackdamper.

After the. pressure of the the pistonv 32, the` pressure and the. pistonbeing connected stem with the bell crank lever 36 `the latter, which,turn, through The ash pit doors and stack; damper. having been closed,the. hre in the furnace 'grad- .ually burns with less. intensity untilthey v steam pressure falls to a sutliclent extent to permit theweighted piston 14e to return to, initial position, said piston in doingso,

4again changing the course of the steam through the pipel 5,'5 to? the.4main cylinder 32 is raised in the main cylinder the steam or pressureiuid in the, pipe 55. is compressed toy a sucient extent to operate thevrelease valve 61 which permits the escape of the exhaust, Huid, and saidpiston, in descending compresses, the, fluid between it and the releasevalve 6'1 to a sulicient extent to operate the latter.

Petcoclrs 75 are arranged, one near the lower end ofthey main cylinderand the other in said cap- 23 to drain thel cylinders. A plug T6 alsoscrews the cap V23v and is adapted to be unscrewed from position topermit the valve member 19 to be adjfusted above the piston As, thepiston rio to increase or diminish the space. through The regulator maybe so arranged as to operate the stack damper alone or the ash pit doorswithout the stack damper, but preferably operates both the stack damperand the ash pit doors.

It will be obvious from the construction disclosed that the pressure inthe boiler or other apparatus to which the regulator is attached may bekept within certain predetermined limits without the presence of anengineer or attendant.

Various changes in the construction and operation of the invention maybe resorted to without departing from the spirit or saericing any of theadvantages of the invention.

Having thus described my invention, what I claim as new isfl. Incombination with the ash pitdoors and stack damper of a fuinace, a mainupright cylinder sustained by the furnace, a piston having a stem,movable therein, a second upright cylinder arranged near the maincylinder, a weighted piston movable therein, adjusting means forregulating the movement of the weighted piston, conducting pipes forconducting a pressure fluid under the weighted piston and above thefirst mentioned piston, a release valve arranged in the conducting pipebetween the cylinders, a conducting pipe for conducting the fluid underthe first mentioned piston with a predetermined nievement of theweighted piston, a discharge pipe communicating with the secondmentioned cylinder at a point below the weighted piston, when in itsnormal position and a second release valve connected with said pipe.

2. In combination with a furnace having ash pit doors and a stackdamper, a main upright cylinder sustained thereby, a piston having astem movable therein, a second cylinder arranged near the main cylinder,a weighted piston movable therein, means for regulating the movement ofthe weighted piston, a conducting pipe adapted for communicating withthe steam chamber of the boiler and the second mentioned cylinder at apoint under the weighted piston for conducting a pressure Huid under thelatter, 'means for conducting the fluid from said last mentionedcylinder to the upper end of the main cylinder, means for changing thecourse of the fluid under the first mentioned piston with apredetermined movement of the weighted piston, a bell crank pivoted tothe furnace and loosely connected at one end with the stem of the firstmentioned piston, a vertically-disposed rock shaft sustained by thefurnace, near one of the ash pit doors, a second rock shaft sustainednear the other of such doors, means for connecting said doors with therock shafts to cause them to swing in open or closed position byactuating the rock shafts, connections between the rock shafts, and aconnection between the outer arm of the bell crank and the firstmentioned rock shaft.

3. In combination with a furnace having ash pit doors and a stackdamper, a main upright cylinder sustained thereby, a second cylinderarranged near the main cylinder, a piston having a stem movable in themain cylinder, a piston receiving member arranged at the lower end ofthe second named cylinder, the bottom wall of said member being formedwith a valve opening, a piston movable in the piston receiving member, avalve carried by said last mentioned piston and adapted to close saidvalve opening, a cylindrical wall depending from the bottom of thepiston receiving member, a cap covering the outer end of said wall, aconducting pipe for establishing communication between the steam chamberof the boiler and the piston receiving membei for conducting a pressurefluid under the weighted piston, a conducting pipe communicating withthe cylindrical wall and upper end of the main cylinder foi' conductingthe fluid above the first nientioned piston, conducting means forchanging the course of' the fluid under the first mentioned piston, witha predetermined movement of the weighted piston, means for permittingthe discharge of the exhaust fluid, and connections for connecting thestem of the first mentioned piston with the ash pit doors and stackdamper.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOHN T. VVEITBREC. fitnesses JOSEPH F. ILoiienn, WM. CoL'rimYAHN, Jr.

